3.1 Reasons for Government Intervention in Markets

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🔹 Why Do Governments Intervene in Markets?

In a free market — a market where buyers and sellers trade without any government involvement — things do not always work out fairly or efficiently. Sometimes, the market produces too much of something harmful. Sometimes, it produces too little of something good. And sometimes, it produces nothing at all when something is very important for society.

When these problems occur, the government steps in to fix them. This is called government intervention. Think of it like a referee in a football match — the referee doesn't play the game, but they step in to enforce the rules and make sure everything runs fairly.

Objective 1: Addressing the Non-Provision of Public Goods

What is a Public Good?

A public good is a special type of good that has two key characteristics:

• Non-excludable: You cannot stop anyone from using it. Even if someone does not pay for it, they can still benefit from it. For example, a lighthouse guides all ships — you cannot tell a ship "you didn't pay, so no light for you!"
• Non-rivalrous: One person using it does not reduce the amount available for others. For example, if you enjoy a fireworks display, this does not mean there is less fireworks display left for others to enjoy.

The Free-Rider Problem

Here is the big issue with public goods. Because they are non-excludable, people can benefit without paying. This is called the free-rider problem — people "ride for free" without contributing.

Imagine a private company tries to set up a flood defence system and charge people for it. People would think: "Even if I don't pay, the flood defence will still protect me anyway — so why pay?" As a result, almost nobody would pay, and the private company would make no profit. Because there is no profit to be made, private firms simply do not produce public goods.

This is a type of market failure — the market has completely failed to provide something that society needs.